2106072355 has 4 divisors (see below), whose sum is σ = 2527286832. Its totient is φ = 1684857880.

The previous prime is 2106072343. The next prime is 2106072359. The reversal of 2106072355 is 5532706012.

It is a semiprime because it is the product of two primes.

It is a de Polignac number, because none of the positive numbers 2^k-2106072355 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2106072359) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 210607231 + ... + 210607240.

It is an arithmetic number, because the mean of its divisors is an integer number (631821708).

Almost surely, 2^2106072355 is an apocalyptic number.

2106072355 is a deficient number, since it is larger than the sum of its proper divisors (421214477).

2106072355 is an equidigital number, since it uses as much as digits as its factorization.

2106072355 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 421214476.

The product of its (nonzero) digits is 12600, while the sum is 31.

The square root of 2106072355 is about 45891.9639479506. The cubic root of 2106072355 is about 1281.8122837439.

Adding to 2106072355 its reverse (5532706012), we get a palindrome (7638778367).

The spelling of 2106072355 in words is "two billion, one hundred six million, seventy-two thousand, three hundred fifty-five".